Auxiliary transmission gear



may 12, 1925:

E. J. GOULD AUXILIARY TRANSMISSION GEAR Filed June 25, 1924 2 Sheets-Sheet 1 A W www INVENTR ww? EMM mWlilEHllw Mmmm May 12, 1925, A 1,537,434

E. J. GOULVD v AUXILIARY TRANSMISSION GEAR' 2 sheets-sheet 2 Filled June 25, 1924' INVENToR v I Patented May l2, 1925.

UNITED STATE-s .1,537,434 Pa'rlN'rl omnes.N

EDWIN J. GOULD, OAKLAND, CALIFORNIA, ASSIGNOR TO CONSOLIDATED CONTROLS CORPORATION, OF OAKLAND, CALIFORNIA, A 'CORPORATION 0F GALIFORNIA.

AUXILIARY TRANSMISSION GEAR,

Application led JuneA 25, 1924.r Serial No. 722,359.

To all whom t may concern:

lBe it known that I, EDWIN J. GoULD, a citizen of the United States, residin at Oakland, county of Alameda, State of alifornia, have invented certain new and usey ful Improvements in Auxiliary Transmission Gears, whereof the following is a speciiication.

This invention is an improved auxiliary transmission gear designed to be attached directly to the differential gear of a motor vehicle, and has for its object the reduction of the speed of the rear axle by one half, and the consequent increase of the driving power a like amount, or by interlocking, drive at the original speed, also to cheapen the cost and increase the strength of this type or'V mechanism.

In the annexed drawings, Fig. 1 is a sectional view ofthe device, together with usual type of differential-gear and the axles of an automobile. Fig. 2 is a vertical section at-the line D D of Fig. 1. Fig. 3 is an yend view of an axle section also Showing gear 3, with its splined hub, and showing how the clutch member 5 is splined thereon with an elevation of the clutch shoulders 6 of the clutch member 5. Like numbers refer to like parts throughout the different views.

Referring more particularly the draw pose of moving the member 5,8 is a sta-4 tionary clutch member fastened to the housing 18 by the bolts 15, with its clutch shoulder 8', litted to engage the shoulders of the member 1 and prevent it (5), together with .the gear 3, from revolving, 9 1s a member riveted to the hollow member 1 by the rivets 17, and also having clutch shoulders 9 to engage those of the member 5, 10 is a cage constructed integral with .the diiierential the outer ends 'of which are united to cage y it y the bolts 11, 12 is a spider with shafts supporting the bevel pinion 4, by which the diierentialcage is driven, 13 are bolts securing the master gear 1Q to the driving member 1, 14 is a support fitting over lthe hub of one of the bevel dierential gears and extending from it to support the driving member 1, -for the purpose of holding'` the latter in perfect alignment. 16 is aV spring secured between the housing 18 andv the shifting member. 7 to prevent the clutch 5 from remaining in a neutral position, 18 is the rear axle housing of an,I automobile;

The letter A indicates ro wherever shown C indicates thrust bearin s, either, plain ory ball, while B shows ba lbearings that are calculated to take'both lateral and thrust load. c

In operation the power is applied to the ller bearing A master gear 19 by the driving pinion, and

this rotates the hollow. member 1, and the bevel gear 2 being splined into the member 1 moves with it, and when a reduced speed of the differential cage 10:isdemanded the clutch mem'- ber 5 is shifted until its projecting shoulders 6 engage with the clutch shoulder 8 of the?` -niember 8 which prevents rotation of Qthe member 5, and alsoof the Vbevel gear 3, since the member 5 is splined into theforwardly extending hub of the bevel gear 3, this causes the bevel pinion4 to travel around thenonrotating bevel ear 3 'when'the pinion 4 is driven b vthe evel gear 2 which reduces the spee of thepimon 4 toone half of that of -the bevel gear 2, and consequently drives the diferentialcage-flO through they shaft 12 at the same speedthatpinionl l 'is moving. Whenf-ihi h' speed is 'required the member 5 'islfshifted lonitudinallly'oi itis re ease the hub of the bevel gear 3 an from the clutch shoulders of the member 8 while the clutch-shoulders 'on the o osite side of the member 5 are engaged wit the clutch shoulders 9 thus loc ing the bevel gears 2 and 3 together twhen no relative movement can take lace between the gears 2, 3 and 4 thus causing Athe differential cage to revolve at the same speed as thel member 1 and the master gear.

The noveltof this type of reduction gear arises from t e fact that the hub of one of the bevel gearsinstead of projectin backwardsfrom the teeth, las isy usua ly the caseprojects forward from the teeth and is continued through the o posite bevel r forming a suport to hol the opposed gel gears rigi y in line 'whether move- 301, 1. anffnuxilarytransin'ission gear,"'the place .I relafively between '.mentf. is","takiiig'g'g A i also 7 allowingi a clutch them or Inet, an

. member-ifobe-.mounted von thejfurther ex tension offthe forwardlyprojectin'g' hub, :5 with thef'sarne efl'eet lofl rigidity and perfect alignment.- 'It is'galso .apparent with this -eoirbiliaiion-, l that the :Whole mechanism 'is held injaligii'ment by the supporti-:rigpmeinber14', andQthat tliere'will be no extra strain -10 onstheflriving bolts 13 s'eurin'g the-4 master I do 'not intend.. to restrict` royselfto ao partieularconstruetion offjparts, as herein.

. dis'"clo$,e l,'butreserveflie right to make sueh .15g changes, ;'v ariatons,` ariel',,inodifie-ations,.v as

l1come.---p'rope'r1yyvithinLtheVSeOpe of ,the proteetio'n'praye'dl'- .g l v thus describedA my' invention, what Ifelaimasnevvsr---4 combination'of a'bevel gear `vvithjan extendv V-ing,-`l11 xb'.afseec'ind bevel gearmounted 'loose- .ly 01.1.35 said .extending liub,'` bevel.- pn'ions i j fand relvolyabl'e.,'fthereomj aV spider alsoi re- Wtheaehf of saicl` 'bevel gears' anl:

named bevel vgear, al

rising a housing driven "said spider into `the diierential easing, bevel pinions revolvably` mounted on said spider shafts"and 'znnesheclWilli both of the said bevel gears, -rneans to prevent the first named `bevel .gear from revolving; for the purpose of driving vthe said dil'erenial ees ling at a. reduced-'speedjfrom tht of the` secy ond named bevel gear ,by the spider shafts, "through .the action -ofthe bevel pinions whilefthe first named bevel 'gearis held non- .revolvable substantially as set forth.,

i3. ln en auxiliary transmission gearV a` dil'erential, a bevel gea-r 'having an extend; ed hub, av plurality of bevel pini'onsinter- ,meshecl "with lir'st n'alned bevel gear-, a fseeond bevel gea-r also intermeshedvwith 'said 'hevel'piions and facing thefrss named -bevel gear, a Aeage'-surrouncling the difieren-,

. tial and extending' over "the before mentioned train-of bevel gears, a shaft ex t 'end'-- ing thru each ofthe .said bevel pinions enel -iiito said cage, a vdriving housii'i'gatteched a etapi'onaryV axle "housing, a shifting meme member, a; means fto move seid 'Shift- 'clutch meinber-4 te be engagecl with the namedv clutch. member, and Velitern'eaefl' ing' member to' e'a-us'e v"bhe second named er1-v 'r the; second named bevel gear end in turn surrounding said differential cage, awp-, po-rtingfmember'attached to fheend of saiolv hoiisinja clutch.'l member secured to'jthejg opposite: en (lfof saicl' housing, a second] clutehI memberI s lined' slidleblyY on the fthe first named 'jbevel' gear, a hird. elm-eh member 'seeureclf o' gagged with"-tli e thirdfname clutch nienfb'er.

"lo lestiriiony that I -elaim ehe foregoing.

'l have hereu'nio'sehmyhakncl in the-pres'enee Witnesses; l

L a mme B;- sri-ewig..

r Envvis J. 

